What is the term for the maximum allowable vapor loss during refueling?

The term that describes the maximum allowable vapor loss during refueling is referred to as "vapor loss allowance." This concept is vital in vapor recovery systems, as it sets the benchmark for how much vapor can be emitted during the transfer of fuel. The vapor loss allowance is intended to minimize the environmental impact associated with gasoline and other fuels by ensuring that refueling operations are conducted with the highest possible efficiency and effectiveness in capturing vapors. Understanding this term is crucial for professionals involved in the installation and repair of vapor recovery systems, as it relates to compliance with environmental regulations and standards aimed at reducing air pollution caused by volatile organic compounds (VOCs).